Description
A flaw was found in the way samba implemented SMB1 authentication. An attacker could use this flaw to retrieve the plaintext password sent over the wire even if Kerberos authentication was required.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | samba | samba 4.15.2, samba 4.14.10, samba 4.13.14 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | samba | 2:4.13.14+dfsg-1 | — |
| Debian 13 | samba | 2:4.13.14+dfsg-1 | — |
| Debian 12 | samba | 2:4.13.14+dfsg-1 | — |
| Debian 11 | samba | 2:4.13.13+dfsg-1~deb11u2 | DSA-5003-1 |
| Debian 10 | samba | 2:4.9.5+dfsg-5+deb10u4 | DLA-3563-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | samba | 2:4.13.14+dfsg-0ubuntu1 | — |
| Ubuntu 20.04 LTS | samba | 2:4.13.14+dfsg-0ubuntu0.20.04.1 | USN-5142-1 |
| Ubuntu 18.04 LTS | samba | 2:4.7.6+dfsg~ubuntu-0ubuntu2.26 | USN-5174-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | samba | No fix yet | — |
| Ubuntu Pro 14.04 LTS | samba | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | ctdb +24 | 4.14.5-7.el8_5 | RHSA-2021:5082 |
| RHEL 7 | ctdb +26 | 4.10.16-17.el7_9 | RHSA-2021:5192 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.4 EUS | ctdb +24 | 4.13.3-8.el8_4 | RHSA-2022:0008 |
| RHEL 8.2 EUS | ctdb +22 | 4.11.2-18.el8_2 | RHSA-2022:0074 |
| Red Hat Gluster Storage 3 | ctdb +20 | 4.11.6-114.el7rhgs | RHSA-2021:4844, RHSA-2021:4843 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | samba-devel +3 | 4.14.5-7.el8_5 | ALSA-2021:5082 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | samba | 4.14.5-7.el8_5 | RLSA-2021:5082 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | ldb | 2.2.2-3.3.1 | SUSE-SU-2021:3647-1 |
| SLES 15 SP3 | samba | 4.13.13+git.528.140935f8d6a-3.12.1 | SUSE-SU-2021:3647-1 |
| SLES 15 SP2 | samba | 4.11.14+git.308.666c63d4eea-4.28.1 | SUSE-SU-2021:3650-1 |
| SLES 15 SP1 | samba | 4.9.5+git.471.5edbe3dcae7-3.57.2 | SUSE-SU-2021:3674-1 |
| SLES 15 | samba | 4.7.11+git.352.41e30c5a0f7-4.57.1 | SUSE-SU-2021:3747-1 |
| SLES 12 SP5 | samba | 4.10.18+git.339.c912385a5e1-3.41.1 | SUSE-SU-2021:3649-1 |
Show 19 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | samba | 4.6.16+git.307.b3899d08cc6-3.64.2 | SUSE-SU-2021:3746-1 |
| SLES 12 SP3 | samba | 4.6.16+git.307.b3899d08cc6-3.64.2 | SUSE-SU-2021:3746-1 |
| SLES 12 SP2 | samba | 4.4.2-38.45.2 | SUSE-SU-2021:3673-1 |
| SLES 2 | samba | 4.11.14+git.308.666c63d4eea-4.28.1 | SUSE-SU-2021:3650-1, SUSE-SU-2021:3647-1 |
| SLES for SAP 15 SP1 | samba | 4.9.5+git.471.5edbe3dcae7-3.57.2 | SUSE-SU-2021:3674-1 |
| SLES for SAP 15 | samba | 4.7.11+git.352.41e30c5a0f7-4.57.1 | SUSE-SU-2021:3747-1 |
| SLES for SAP 12 SP5 | samba | 4.10.18+git.339.c912385a5e1-3.41.1 | SUSE-SU-2021:3649-1 |
| SLES for SAP 12 SP4 | samba | 4.6.16+git.307.b3899d08cc6-3.64.2 | SUSE-SU-2021:3746-1 |
| SLES for SAP 12 SP3 | samba | 4.6.16+git.307.b3899d08cc6-3.64.2 | SUSE-SU-2021:3746-1 |
| SLE Micro 5.1 | ldb | 2.2.2-3.3.1 | SUSE-SU-2021:3647-1 |
| SLE HPC 15 SP1 | samba | 4.9.5+git.471.5edbe3dcae7-3.57.2 | SUSE-SU-2021:3674-1 |
| SLE HPC 15 | samba | 4.7.11+git.352.41e30c5a0f7-4.57.1 | SUSE-SU-2021:3747-1 |
| SUSE OpenStack Cloud Crowbar 9 | samba | 4.6.16+git.307.b3899d08cc6-3.64.2 | SUSE-SU-2021:3746-1 |
| SUSE OpenStack Cloud Crowbar 8 | samba | 4.6.16+git.307.b3899d08cc6-3.64.2 | SUSE-SU-2021:3746-1 |
| SUSE OpenStack Cloud 9 | samba | 4.6.16+git.307.b3899d08cc6-3.64.2 | SUSE-SU-2021:3746-1 |
| SUSE OpenStack Cloud 8 | samba | 4.6.16+git.307.b3899d08cc6-3.64.2 | SUSE-SU-2021:3746-1 |
| SUSE HPE Helion OpenStack 8 | samba | 4.6.16+git.307.b3899d08cc6-3.64.2 | SUSE-SU-2021:3746-1 |
| SUSE Enterprise Storage 7 | ldb | 2.2.2-4.6.1 | SUSE-SU-2022:0361-1 |
| SUSE Enterprise Storage 7 | samba | 4.13.13+git.545.5897c2d94f3-3.12.1 | SUSE-SU-2022:0361-1 |
| SUSE Enterprise Storage 6 | samba | 4.9.5+git.471.5edbe3dcae7-3.57.2 | SUSE-SU-2021:3674-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | samba | 4.15.2+git.193.a4d6307f1fd-1.1 | openSUSE-SU-2024:11631-1 |
| openSUSE Leap 15.3 | ldb | 2.2.2-3.3.1 | openSUSE-SU-2021:3647-1 |
| openSUSE Leap 15.3 | samba | 4.9.5+git.471.5edbe3dcae7-3.57.2 | openSUSE-SU-2021:3674-1, openSUSE-SU-2021:3650-1, openSUSE-SU-2021:3647-1 |
| openSUSE Leap 15.2 | samba | 4.11.14+git.308.666c63d4eea-lp152.3.28.1 | openSUSE-SU-2021:1471-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | samba | 4.15.2-r0 | — |
| Alpine v3.23 | samba | 4.15.2-r0 | — |
| Alpine v3.22 | samba | 4.15.2-r0 | — |
| Alpine v3.21 | samba | 4.15.2-r0 | — |
| Alpine v3.20 | samba | 4.15.2-r0 | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | samba | 4.15.2-r0 | — |
| Alpine v3.18 | samba | 4.15.2-r0 | — |
| Alpine v3.17 | samba | 4.15.2-r0 | — |
| Alpine v3.16 | samba | 4.15.2-r0 | — |
| Alpine v3.15 | samba | 4.15.2-r0 | — |
| Alpine v3.14 | samba | 4.14.12-r0 | — |
| Alpine v3.13 | samba | 4.13.17-r0 | — |
Advisories 29
- ALSA-2021:5082 Important: samba security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2022-0432 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 11, 2026
- WID-SEC-2022-0302 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode mit Administratorrechten BSI CERT-Bund (WID) · Oct 11, 2026
- RHSA-2022:0074 Red Hat Security Advisory: samba security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2022:0008 Red Hat Security Advisory: samba security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2021:5192 Red Hat Security Advisory: samba security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2021:5082 Red Hat Security Advisory: samba security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2021:4844 Red Hat Security Advisory: samba security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2021:4843 Red Hat Security Advisory: samba security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-5142-1 samba vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-5174-1 samba vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5003-1 samba - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3563-1 samba - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2021:5082 Important: samba security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2021:3650-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3649-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3746-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1471-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11631-1 ctdb-4.15.2+git.193.a4d6307f1fd-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3650-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3647-1 Security update for samba and ldb SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0361-1 Security update for ldb, samba SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3647-1 Security update for samba and ldb SUSE / openSUSE Security Updates · May 7, 2025
- openSUSE-SU-2021:3674-1 Security update for samba SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2021:3747-1 Security update for samba SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2021:3673-1 Security update for samba SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2021:3674-1 Security update for samba SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2022-2279 Samba: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 21, 2023
- WID-SEC-2022-0676 Juniper Junos Space: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 11, 2023